diff -r 9537bf1c4853 -r 5b7a9633cfa8 src/Doc/Tutorial/Protocol/Event.thy
--- a/src/Doc/Tutorial/Protocol/Event.thy	Sun Nov 02 18:21:14 2014 +0100
+++ b/src/Doc/Tutorial/Protocol/Event.thy	Sun Nov 02 18:21:45 2014 +0100
@@ -7,7 +7,7 @@
     stores are visible to him
 *)(*<*)
 
-header{*Theory of Events for Security Protocols*}
+section{*Theory of Events for Security Protocols*}
 
 theory Event imports Message begin